Wood blocks underneath components?? snake oil?


Hi, I have read that putting some sort of woood blocks underneath components helps in the sound. In particular, I believe Ayre actually suggests doing this. Can anyone explain to me how this helps?
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Albert,

Funny you ask because this song sounds especially good with the tree in place, as do the old blues standards "Shake Yo' Limbs for Me" and "Ain't No Money Tree, Baby." Go figure.
I've just begun demolition on a wall in my room but the adjacent tree is oak...do you think it will have the same effect as pine?